he has supported limited military intervention in syria, something the president has resisted. over his 30-year career, kerry has built deep relationships with many foreign leaders. >> there are very few people in our country with greater experience over a longer period of time in foreign policy than senator kerry. >> reporter: perhaps kerry's biggest challenge to date is not his confirmation hearings on capitol hill, but rather following in hillary clinton's footsteps who has become one of the most popular officials in the obama cabinet, both here and abroad. katebolduan, cnn, washington. >>> up next hour, we'll talk to wolf blitzer about the multiple names being floated as kerry's replacement in the u.s. senate, including actor and humanitarian ben affleck. >>> calls and e-mails to the hot line of autism speaks have gone up 130% since last week's shooting in newtown. coming up next, we'll talk to dr. sanjay gupta who will join me in studio to explain asperger's and address, apparently, all the questions that are out there now. oh, let me guess --ou see this? more washington g